1012009 has 2 divisors, whose sum is σ = 1012010. Its totient is φ = 1012008.

The previous prime is 1012007. The next prime is 1012031. The reversal of 1012009 is 9002101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 595984 + 416025 = 772^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012009 - 2¹ = 1012007 is a prime.

Together with 1012007, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1012009.

It is not a weakly prime, because it can be changed into another prime (1012007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506004 + 506005.

It is an arithmetic number, because the mean of its divisors is an integer number (506005).

2^1012009 is an apocalyptic number.

It is an amenable number.

1012009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012009 is an equidigital number, since it uses as much as digits as its factorization.

1012009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1012009 is about 1005.9865804274. The cubic root of 1012009 is about 100.3987082049.

The spelling of 1012009 in words is "one million, twelve thousand, nine".